CP violation and the K → μ+μ− puzzle

Abstract

The unitarity relations for K → μ + μ − are studied under the assumption of CPT alone, and including γγ, ππ, and the CP even π π γ states in the absorptive parts for both K S and K L. A new bound for K S → μ μ is obtained and it is shown explicitly that superweak theory contradicts present experimental data under these assumptions.